Enabling High-Quality Unte thered Virtual Reality
NSDI 2017
Omid Abari, Dinesh Bharadia, Austin Duffield, and Dina Katabi, Massachusetts Institute of Technology
Virtual Reality
• the headset’s cable not only limits the player’s mobility but also creat es a tripping hazard.
Cable&Wireless System
• Stream 6.4Gbps of data from PC to headsets
• typical wireless systems ： such as WiFi
• mmWave ：
• transmit over 2 GHz of bandwidth and deliver up to 6.8 Gbps
Challenges
• Signal Blockage
Impact of Blockage
mmWave Mirrors
MoVR
• A wireless communication system for virtual reality applications. It en ables a sustainable, high-data-rate wireless link.
• Programmable mmWave Mirrors
• Can control both the angles of incidence and reflection
• Amplifies and Reflects
MoVR programmable mmWave mirror
Challenge
• Beam Alignment
AP
Headset
Leakage
Amplifier’s characteristic
• Draws significantly higher current (from a DC power supply) as it gets close to saturation mode
MoVR’s mirror performance
Beam alignment accuracy
The SNR
Data Rate
SNR at the headset’s receiver
Conclusion
• MoVR, a system that enables a reliable and high-quality untethered V R experience via mmWave links.
• Provides a sustainable, high-data-rate wireless link to the VR headset even in the presence of blockage and mobility
• mmWave mirror that can reconfigure itself and adapt its angles of inc idence and reflection.
• Combines VR headset tracking information with RF-based localization to quickly steer the mmWave radios’ beams
